Oiling device for metal sheet

ABSTRACT

An oiling device for oiling metal sheet which comprises a pair of oiling rollers covered with elastic porous pads. The metal sheet passes through the gap between the rollers so that it can be oiled on both sides. Guide means are provided for moving the rollers towards or away from each other. The guide means are comprised of air cylinders for causing at least one of the rollers to move towards the other and spring means to cause the rollers to separate from each other.

United States Patent 1191 Kitazawa 1 Apr. 23, 1974 OlLlNG DEVICE FORMETAL SHEET [76] Inventor: Novoru Kitazawa, 4-10, 2-chome,

Daitakubo, Urawa-shi, Saitama-ken, Japan [22] Filed: Oct. 30, 1972 21Appl. No.: 301,731

Related US. Application Data [62] Division of Ser. No. 86,740, Nov. 4,1970, Pat. No'.

[52] US. Cl 118/227, 118/255, 118/259 [51] Int. Cl. B05c 1/10 [58] Fieldof Search 118/227, 259, 228, 255; 184/17, 16; 29/125 [56] ReferencesCited UNITED STATES PATENTS 1,150,092 8/1915 Anger 118/227 2,326,4298/1943 Black et a] 118/227 2,775,953 l/l957 McFall 118/227 2,870,737l/l959 Byrnes 118/227 3,166,441 l/l965 Rylka 118/325 3,408,984 ll/1968Pullens 118/259 Primary Examiner-John P. Mclntosh Attorney, Agent, orFirm-Wenderoth, Lind & Ponack [57] 1 ABSTRACT An oiling device foroiling metal sheet which comprises a pair of oiling rollers covered withelastic porous pads. The metal sheet passes through the gap be-' tweenthe rollers so that it can be oiled on both sides. Guide means areprovided for moving the rollers towards or away from each other. Theguide means are comprised of air cylinders for causing at least one ofthe rollers to move towards the other and spring means to cause therollers to separate from each other.

14 Claims, 8 Drawing Figures RATENTEDAPRQB m4 3.805738 sum 2 OF 3 FIG; 5FIGQ? 4528 '38-" E3 2 32k. l

v III DATENTEUAPRZS 1974 7 3805738 sum 3 OF 3 F IG. 8,

v i A g This application is a Division of my co-pending application Ser.No. 86,740 filed Nov. 4, 1970 now U.S. Pat. No. 3,710,469.

This invention is concerned with an oiling device for use with metalsheets. More particularly, the invention is concerned with an oilingdevice for use with metal sheets after the sheets are pickled or whilethe sheets are on the shearing line, etc. in the rolling process.

Known means for oiling both sides of steel sheet in the rolling processare spraying means and coating means involving the employment of rubberrollers. However, the former has the disadvantage that oil is wasted inlarge quantitites and satisfactory oiling on the reverse side of thesteel sheet is difficult. The latter has the disadvantage that oil isscattered by centrifugal force when the roller rotates at high speed.

This invention has overcome the disadvantages of the heretofore knownoiling means for metal sheet. The present invention provides a new andimproved oiling roller and oiling device.

One of the features of the present invention is to provide an oilingdevice including a hollow arbor having a plurality of small holespenetrating the arbor wall on the circumference thereof, an elasticporous pad in a cylindrical form placed over the circumference of saidhollow arbor, and means for pressing the circumferential portion of saidcylindrical pad in the axial direction of the same cylinder.

Thus, if said oiling roller is brought into contact with the surface ofthe metal sheet being fed and oil is introduced under pressure into theinternal space of said hollow arbor, the oil introduced permeatesthrough said small holes into the pad. Since the circumferential portionof the pad is pressed by said pressing means, the external exudation ofsaid oil permeated is adequately controlled. Accordingly, when theoiling roller is caused to rotate, the oil is prevented from scatteringby centrifugal force. An adequate amount of oil is applied to thesurface of the metal sheet.

The said elastic porous pad may preferably be nonwoven fiber and spongymaterial, such as sponge rubber, non-cellular type synthetic resin foam,and the like, having oil and thermal resistance.

Another feature of the present invention is to provide a device foroiling the surface of metal sheet. Such dcvice comprises a pair of saidoiling rollers for oiling both sides of the metal sheet and a means formovably supporting said pair of oiling rollers in such a manner as torelatively contact and separate each other.

Thus, said pair of oiling rollers are forced away from each other by thespring means while at the same time they are forced toward each other bymeans of the air cushion of the air cylinder.

Even if the cross-section of the metal sheet passing between the oilingrollers is uneven or wave-like, both oiling rollers can make appropriatemovements according to such wave-like cross-section of the sheet, andboth sides of the sheet are oiled evenly.

One object of the present invention is to provide an oiling devicecapable of oiling metal sheet economically. Another object of theinvention is to provide an oiling device capable of oiling evenly bothsides of the metal sheet, even if such sheet is uneven.

The preferred embodiment of the present invention will be hereinafterdescribed with reference to the accompanying drawings.

FIG. 1 is a view partially shown in cross-section of the oiling roller;

FIG. 2 is a view in perspective of the porous tip;

FIG. 3 is a view inside elevation of the hollow arbor;

FIG. 4 is a view shown in cross-section of another embodiment of theoiling roller partially omitting some components;

FIG. 5 is a view shown in cross-section of the oiling device partiallyomitting some components thereof;

FIG. 6 is a view in section taken as indicated along the line VI-VI ofFIG. 5;

FIG. 7 is a view shown in cross-section of another embodiment of theoiling device partially omitting some components; and

FIG. 8 is an oil pressure circuit diagram.

The preferred embodiment of the present invention is hereinafterdescribed with reference to FIGS. 1 and 2.

The cylindrical pad 2 placed over the circumference of the hollow arbor1 consists of a'plurality of disk shaped non-woven fiber or porous ringshaving holes 4 in the center thereof, as shown in FIG. 2, said ringsbeing piled one upon the other.

The said non-woven fiber ring 3 can be made from such synthetic fibersas nylon, orlon, dacron, etc., such natural fibers as cotton, wool,hemp, etc., and/or such mineral fibers as asbestos, glass, etc. Thesefibers are mixed with each other at random and bound to each other byresinous adhesives having oil and heat resistance in such a manner as tohave spaces among the fibers.

The following is a representative: example of the nonwoven fiber: h

F iber: Nylon filament (0.2-0.6mm in diameter) Adhesive:

1. Primary resinous liquid mixture Polyester resin 50 gToluendiisocyanate 50 g Naphtha 30 g Butyl Acetate g 2. Secondaryresinous liquid mixture Phenol resin 70 g Epoxide resin 10 g SiliconeResin 10 g Cellosolve acetate 10 g Methyl ethyl ketone 40 g Ethylacetate 10 g Acid anhydride 0.5 g i The primary liquid mixture issprayed to the fibers which are at random mixed with each other. Afterthe mixture is dried, the secondary liquid mixture is sprayed thereto.

On the circumference of the said hollow arbor-1 are provided spiralgrooves 6 running in opposite directions to each other with the centralpart of the arbor as the border. Further, within the said grooves 6 isprovided a plurality of small holes 7 penetrating the arbor wall intothe internal space of the hollow arbor.

The said hollow arbor 1 is further provided with stepped journals 8extended at both ends thereof. Each journal is provided with a passage 9running into the internal space of the said hollow arbor. Further, amale thread 10 is provided on the circumference of the largest part ofeach journal contiguous to the end'of the said hollow arbor. Press disks11 for pressing the said pad 2 are formed in such a manner that theinner surface thereof has inclined surface 12 inclined toward the pad,as shown in FIG. 1. These two press disks are positioned at both ends ofthe hollow arbor 1 contiguous to both sides of said pad 2. They arepressed toward the center by washers 13 and two push nuts'14 and 15screwed on said male thread 10.

Since the said pad is pressed by the inclined surface 12 of said twodisks 11, the circumferential area of the pad is pressed more tightlythan the other portions thereof. Accordingly, the spaces among thefibers on the circumferential area of the pad become smaller and theexudation of oil is controlled.

Another example of the oiling roller will now be described withreference to FIG. 4.

Into the hollow arbor is inserted the core arbor 116, the diameter ofwhich is smaller than the inner diameter of the hollow arbor 101 andwhich has flanges 117 at both ends thereof. The screws 118 extended atboth ends of said core arbor are screwed in the base of said journal108. Thus, there is provided the cylindrical inner space between theinner wall of the hollow arbor and the core arbor.

The screws 118 of said core arbor are provided with passages 119connecting the passages 109 of said journals. The flanges 117 areprovided with a plurality of conduits 120 which branch off from saidpassage 119 and connect with said cylindrical inner space 105. Inaddition, the pad 102 comprises a plurality of porous rings piled uponeach other, said rings being made of sequential type urethane foam. Thenumbers 106, 107, 110, 111,112,113, 114 and 115 in FIG. 4 refer to theparts which are substantially the same as illustrated in FIG. 1.

When the oiling roller of this example is brought into contact with thesurface of the metal sheet being fed, and when oil is introduced underpressure into the cylindrical inner space 105, the amount of oilcontained in the hollow arbor is small. Therefore, the permeation of oilinto the pad is hardly affected by the centrifugal force when the saidoiling roller is rotated. A nearly fixed amount of oil is thus fed intothe pad. Further, since no air is contained within the said cylindricalinner space, or if air is contained therein the amount would be small,the oiling roller hardly vibrates. Accordingly, oil is almost evenlyapplied to the metal sheet.

An oiling device provided with either one of the aforementioned oilingrollers is hereinafter described with reference to FIGS. 5 and 6.

The frame consists of two supporting towers 221 and beams 222 connectingsaid towers.

In FIG. 5, only one of the towers is shown, but the other tower is ofthe same construction. On both walls 223 of the tower are verticallyplaced channel-type by the operation of the air cylinder. When it is notin motion, it is subjected to the air cushion of the air cylinder.

The lower bearing box 226 is provided with sleeve 231 having therein afemale thread at the lower end thereof. In this sleeve is screwed screwshaft 233 of the fine adjustment 232 fixed on the tower bed. On thebearings 234 within the bearing boxes 225 and 226 is rotativelysupported each journal 208 of a pair of oiling rollers A and A. Thereare also provided dents 235 and 236, respectively, on the lower side ofthe bearing box 225 and the upper side of the bearing box 226. Springshoe 237 is inserted in one dent 235 and spring 238 is inserted betweenthis spring shoe and the other dent 236 for elastically supporting theupper oiling roller and the bearing box 225. Rotary joints 244 arerespectively connected with the ends of said journal. To these rotaryjoints are connected oil pipes.

The said fine adjustment 232 is provided with a worm wheel 239 fixed onthe lower end of saidscrew shaft 233 and a worm 240 which gearstherewith. The handle 242 is fixed on one end of worm shaft 241 andconnecting rod 243 is connected by means of a pin with the other end ofthe said shaft.

The other supporting tower is provided with the same guide plates,bearing boxes, air cylinder, spring and fine adjustment, as mentionedabove. On the two bearing boxes of the other tower are respectivelysupported the other journals of a pair of said oiling rollers. To theworm shaft of the other fine adjustment is connected the other end ofsaid connecting rod 243.

The rotation of said handle 242 is conveyed to the screw shaft 233 byway of worms 240 and worm wheels 239 of both fine adjustments. Therotation of said screw shaft causes the sleeve 231 to move up and down.In accordance therewith, the lower oiling roller A moves up and down.

In operation, after properly adjusting the position of the lower oilingroller A relative to the pass line of the metal sheet, the bearing box225 is caused by the operation of the air cylinder to move either up ordown in order to properly position the upper oiling roller A. Thedesired position is that which causes the pad 202 of the upper roller toslightly touch that of the lower roller. If, in such position, the metalsheet is caused to pass between the oiling rollers A and A, both rollersrotate by means of friction and the oil contained in the pads is appliedto both sides of the metal sheet.

An oil pressure circuit for the aforementioned oiling device will now bedescribed with reference to FIG. 8.

Pipes 246 and 246 respectively connected with two oil tanks 245 and 245are connected with the input pipe of the oil pump 248 by way of magneticvalves 247 and 247'. The pipes 251 and 252 and the pipes 251' and 252',respectively, connected with the output pipe of said oil pump areconnected with each of a pair of oiling rollers by way of magneticvalves 253 and 254 and magnetic valves 251 and 252.

Further, pipes 255 and 255' connected with said oil tanks 245 and 245are respectively connected with the input pipe 258 of the vacuum pump257 by way of magnetic valves 256 and 256. The output pipe 259 of saidvacuum pump is connected with the output pipe 250 of said oil pump byway of magnetic valve 260. Further, the input pipe 249 and output pipe250 of said oil pump are connected with each other by means of pipe 262having therein stop valve 261. Said output pipe 250 has magnetic valve263 between oil pump 248 and the junction of said pipe 250 and pipes 259and 262.

Further, a pressure adjustment circuit is added to said circuit. Thepipes 264 and 264' connected with said oil tanks 245 and 245' arerespectively connected with pipes 266 and 267 and pipes 266 and 267 byway of magnetic valves 265 and 265'. Pipes 266 and 267 and pipes 266'and 267' are respectively connected with each journal of a pair of saidoiling rollers by way of pressure relief valves 268, 269, 268 and 269'.

Oil tanks 245 and 245' are filled with oils which may vary according tothe intended purpose, such as, for example, oils which are different inviscosity, oils which are different in drying speed, etc.

When the oil in the oil tank 245 is used in said oil pressure circuit,magnetic valves 247, 263, 253, 253, 254, 254' and 265 are caused to opento operate the oil pump 248. The oil of oil tank 245 is fed underpressure into the internal space of the hollow arbor. When the oilpressure within said internal space becomes higher than the fixedpressure, pressure relief valves 268, 268, 269 and 269' automaticallyopen, and the oil within said internal space returns to the oil tank245.

When the oil in oil tank 245' is used, the oil pump is first stopped andmagnetic valves 263, 253, 253, 254, 254' and 265 are caused to open tooperate the oil pump 248. The oil of the oil tank 245 is fed underpressure into the internal space of the hollow arbor. When the oilpressure within said internal space becomes higher than the fixedpressure, pressure relief valves 268, 268, 269 and 269' automaticallyopen, and the oil within said internal space returns to the oil tank245.

When the oil tank 245 is used, the oil pump is first stopped andmagnetic valves 263, 253, 253, 254, 254', 256 and 260 and stop valve 261are caused to open to operate the vacuum pump 256. The oil in oilingrollers A and A, oil pump 248 and pipes connected therewith return tothe oil tank 245. Then, magnetic valves 247, 263, 253, 253, 254 and 254'are caused to open to operate the oil pump 248. The oil of the oil tank245' is then fed under pressure to the oiling rollers.

Another embodiment of the oiling device support structure is illustratedin FIG. 7. The lower bearing box is connected by means of pin 372 withram 371 of the air cylinder 370 vertically supported on the bed of thesupporting tower 321 in place of the fine adjustment. The numbers 305,314, 315, 322, 323, 324, 325, 327, 328, 329, 330, 337, and 338 refer tothe parts which are substantially the same as illustrated in FIGS. 5 and6.

In this example of the embodiment, a pair of oiling rollers A and A aresubjected to the air cushions of air cylinders 328 and 370.

What is claimed is: l

1. A device for oiling metal sheet comprising a pair of oiling rollers,each roller including a hollow arbor having a spiral groove on thecircumference thereof and a plurality of small holes penetrating thecircumferential wall of said arbor and opening into said groove, acylindrically shaped elastic porous pad placed over the circumference ofsaid hollow arbor and means for pressing the circumferential portion ofsaid cylindrical pad in the axial direction towards the center of thecylinder; guide means for moving said pair of oiling rollers toward andaway from each other, said guide means comprising air cylinder means formoving at least one roller towards or away from the other and forimparting an air cushion to said one roller and spring means for forcingsaid oiling rollers away from each other.

2. The device according to claim 1 further comprising journals extendedfrom-both ends of each oiling roller and having a passage communicatingwith the internal space of said hollow arbor, and wherein said guidemeans further comprises bearing boxes for rotatively supporting saidjournals and channel-type guide plates for movably supporting saidbearing boxes, said cylinders being connected with said bearing boxes ofat least one of the oiling rollers, and said] spring means beingpositioned between the bearing boxes of said pair of oiling rollers.

3. The device according to claim 1 further comprising fine adjustmentmeans for adjusting the position of the said other oiling rollerrelative to the pass line of the metal sheet.

4. The device according to claim 3 further comprising journals extendedfrom both ends of each oiling roller and having a passage communicatingwith the internal space of said hollow arbor, and wherein said guidemeans further comprises bearing boxes for rotatively supporting saidjournals and channel-type guide plates for movably supporting saidbearing boxes, said fine adjustment means comprises screw shafts screwedin the bearing boxes of said other oiling roller, worm wheels fixed onsaid screw shafts, and driving worms to gear with said worm wheels.

5. The device according to claim 1 further comrpising air cylinder meansfor moving the other oiling roller and imparting an air cushion to theother oiling roller.

6. The device according to claim 1 furthercomprising an oil pressurecircuit for feeding oil into the hollow arbors of said oiling rollers,said oil pressure circuit comprising at least one oil tank, an oil pumpfor feeding the oil of said oil tank into said hollow arbors and conduitmeans for guiding said oil being fed.

7. The device according to claim 6 in which said oil pressure circuitfurther comprises a plurality of oil tanks containing different oils,valve means for selec tively feeding the oil in either one of said oiltanks under pressure into said hollow arbors, vacuum pump means forreturning the oil in said hollow arbors and oil pump to the same oiltank from which it came, and conduit means for guiding the returningoil.

8. The device according to claim 1 wherein the hollow arbor of each ofsaid rollers has a pair of spiral grooves on the circumference thereof,said spiral grooves running in opposite directions with the axial centerof said arbor as the border between said grooves.

9. The device according to claim 8 further comprising journals extendedfrom both ends of each oiling roller and having a passage communicatingwith the internal space of said hollow arbor, and wherein said guidemeans further comprises bearing boxes for rotatively supporting saidjournals and channel-type guide plates for movably supporting saidbearing boxes, said cylinders being connected with said bearing boxes ofat least one of the oiling rollers, and said spring means beingpositioned between the bearing boxes of said pair of oiling rollers.

10. The device according to claim 8 further comprising fine adjustmentmeans for adjusting the position of the said other oiling rollerrelative to the pass line of the metal sheet.

11. The device according to claim 10 further comprising journalsextending from both ends of each oiling roller and having a passagecommunicating with the internal space of said hollow arbor, and whereinsaid guide means further comprises bearing boxes for rotativelysupporting said journals and channel type guide plates for movablysupporting said bearing boxes, said fine adjustment means comprisesscrew shafts screwed in the bearing boxes of said other oiling roller,worm wheels fixed on said screw shafts, and driving worms to gear withsaid worm wheels.

12. The device according to claim 8 further comprising air cylindermeans for moving the other oiling roller and imparting an air cushion tothe other oiling roller.

under pressure into said hollow arbors, vacuum pump means for returningthe oil in said hollow arbors and oil pump to the same oil tank fromwhich it came, and conduit means for guiding the returning oil.

1. A device for oiling metal sheet comprising a pair of oiling rollers,each roller including a hollow arbor having a spiral groove on thecircumference thereof and a plurality of small holes penetrating thecircumferential wall of said arbor and opening into said groove, acylindrically shaped elastic porous pad placed over the circumference ofsaid hollow arbor and means for pressing the circumferential portion ofsaid cylindrical pad in the axial direction towards the center of thecylinder; guide means for moving said pair of oiling rollers toward andaway from each other, said guide means comprising air cylinder means formoving at least one roller towards or away from the other and forimparting an air cushion to said one roller and spring means for forcingsaid oiling rollers away from each other.
 2. The device according toclaim 1 further comprising journals extended from both ends of eachoiling roller and having a passage communicating with the internal spaceof said hollow arbor, and wherein said guide means further comprisesbearing boxes for rotatively supporting said journals and channel-typeguide plates for movably supporting said bearing boxes, said cylindersbeing connected with said bearing boxes of at least one of the oilingrollers, and said spring means being positioned between the bearingboxes of said pair of oiling rollers.
 3. The device according to claim 1further comprising fine adjustment means for adjusting the position ofthe said other oiling roller relative to the pass line of the metalsheet.
 4. The device according to claim 3 further comprising journalsextended from both ends of each oiling roller and having a passagecommunicating with the internal space of said hollow arbor, and whereinsaid guide means further comprises bearing boxes for rotativelysupporting said journals and channel-type guide plates for movablysupporting said bearing boxes, said fine adjustment means comprisesscrew shafts screwed in the bearing boxes of said other oiling roller,worm wheels fixed on said screw shafts, and driving worms to gear withsaid worm wheels.
 5. The device according to claim 1 further comrpisingair cylinder means for moving the other oiling roller and imparting anair cushion to the other oiling roller.
 6. The device according to claim1 further comprising an oil pressure circuit for feeding oil into thehollow arbors of said oiling rollers, said oil pressure circuitcomprising at least one oil tank, an oil pump for feeding the oil ofsaid oil tank into said hollow arbors and conduit means for guiding saidoil being fed.
 7. The device according to claim 6 in which said oilpressure circuit further comprises a plurality of oil tanks containingdifferent oils, valve means for selectively feeding the oil in eitherone of said oil tanks under pressure into said hollow arbors, vacuumpump means for returning the oil in said hollow arbors and oil pump tothe same oil tank from which it came, and conduit means for guiding thereturning oil.
 8. The device according to claim 1 wherein the hollowarbor of each of said rollers has a pair of spiral grooves on thecircumference thereof, said spiral grooves running in oppositedirections with the axial center of said arbor as the border betweensaid grooves.
 9. The device according to claim 8 further comprisingjournals extended from both ends of each oiling roller and having apassage communicating with the internal space of said hollow arbor, andwherein said guide means further comprises bearing boxes for rotativelysupporting said journals and channel-type guide plates for movablysupporting said bearing boxes, said cylinders being connected with saidbearing boxes of at least one of the oiling rollers, and said springmeans being positioned between the bearing boxes of said pair of oilingrollers.
 10. The device according to claim 8 further comprising fineadjustment means for adjusting the position of the said other oilingroller relative to the pass line of the metal sheet.
 11. The deviceaccording to claim 10 further comprising journals extending from bothends of each oiling roller and having a passage communicating with theinternal space of said hollow arbor, and wherein said guide meansfurther comprises bearing boxes for rotatively supporting said journalsand channel type guide plates for movably supporting said bearing boxes,said fine adjustment means comprises screw shafts screwed in the bearingboxes of said other oiling roller, worm wheels fixed on said screwshafts, and driving worms to gear with said worm wheels.
 12. The deviceaccording to claim 8 further comprising air cylinder means for movingthe other oiling roller and imparting an air cushion to the other oilingroller.
 13. The device according to claim 8 further comprising an oilpressure circuit for feeding oil into the hollow arbors of said oilingrollers, said oil pressure circuit comprising at least one oil tank, anoil pump for feeding the oil of said oil tank into said hollow arborsand conduit means for guiding said oil being fed.
 14. The deviceaccording to claim 13 in which said oil pressure circuit furthercomprises a plurality of oil tanks containing different oils, valvemeans for selectively feeding the oil in either one of said oil tanksunder pressure into said hollow arbors, vacuum pump means for returningthe oil in said hollow arbors and oil pump to the same oil tank fromwhich it came, and conduit means for guiding the returning oil.